Phoronix reports Ubuntu is having major power regression issues on mobile devices:
"For those that follow my personal Twitter feed will know that
for the past week I've been closely testing Ubuntu 11.04 and all Ubuntu
releases going back to Ubuntu 8.04 on many mobile devices in the office.
The overall system performance, power consumption, and boot performance
have been the principal targets. However, late this week I discovered a
glaring regression: Ubuntu 11.04 is viciously going through power.
Compared to Ubuntu 10.10, the power consumption on Ubuntu 11.04 for
mobile devices is up about 10% on average but under some workloads, I am
seeing the power consumption up by nearly 30%. This is happening on many
mobile systems spanning multiple generations of Intel CPUs and with
Intel / ATI / NVIDIA graphics. This issue has been tracked down to a
frightening kernel regression in the mainline tree that is still not